Lease-rod for looms, warping-machines, and the like.



PATENTED JUNE 18, 1907.

T. A. B. CARVER.

LEASE ROD FOR LOOMS, WARPING MACHINES, AND THE LIKE.

APPLICATION FILED 8BPT.28,1906.

unrrnn STATES PATENT OFFICE.

THOMAS ALBERT BRIGGS CARVER, OF GLASGOW, SCOTLAND.

Specification of Letters Patent.

Patented June 18,1907.

Application filed September 28, 1905. Serial No. 280,507.

To all toll/0117, it may concern: v

Be it known that I, THOMAS ALBERT BRIGGS CARVER, a subject of the Kingof Great Britain, residing at 33 Renfield street, in Glasgow, Scotland,civil engineer, have invented certain new and useful Improvements inLease-Rods for Looms, Warping- Machines, and the Like, of which thefollowing is a specification.

Breakages of the yarn in looms, warping machines or the like are liableto occur when the threads passing above and below the lease rods adheretogether owing to the dressing of the warp or from any other cause. Bythis invention these breakages are diminished by constructing the leaserods in such a manner that they can expand and contract in a directionat right angles to the plane of the warp, so that the surfaces againstwhich the threads lie on the rod above and below it, or on one side ofit and the other, can move relatively to each other in obedience to theperiodic variations of tension in the warp. For instance, the rod may bedivided longitudinally and the two parts connected together by suitablesprings, the threads of the warp lie respectively against the toppolished surface and against the bottom polished surface of thiscompound rod, in the case of a hori-v zontal lease rod, and the rodcontracts and expands as the warp is tightened and loosened. Or the rodsmay have separate surfaces connected by springs which term includesdevicesdepending on fluid pressure.

The invention is particularly applicable to looms or warping machineswhich are fitted with warp stop motions more particularly a warp stopmotion of the kind described in the specification to U. S. LettersPatent N 0. 740672.

In the accompanying drawings Figure 1 is a perspective view of a leaserod made according to the invention Fig. 2 is a cross section and Fig. 3a side elevation of a modification of the rod, and Fig. 4 isa verticalsection through a part of a loom provided with a warp stop motionaccording to the aforesaid specification and a lease rod according tothis invention.

I11 all the figures like reference letters' indicate like parts.

The lease rod is made in two parts, a and I), connected together bysprings c which may be laminar springs as shown in Fig. 1 or helicalsprings as shown in Figs. 2 and 3. The threads pass over and under thiscompound rod as indicated by d in Fig. 2, and the surfaces against whichtheyrest may be polished. The expansive medium between 'the sections ofthe lease rod expands as will be apparent upon an inspection of thedrawings on a straight line instead of on a curved line. This expansivemediumin the present case consists of several springs as will beunderstood from what has been stated.

When the lease rod is applied in conjunction with a warp stop motion itneed only be used as the rod over which the warp first passes, becauseit is at this point that the opening of the yarn is particularlyrequired. This is shown in Fig. 4 where the warp (1 moves in .thedirection of the arrow and passes first over the expanding lease rod andthen over an ordinary lease rod e. at its lower end to a suitable beam 9and is held at its upper part in front of the crossing of two of thewarp threads. If either of these threads breaks the wire springs backand serves either to indicate to the attendant that the machine is to bestopped or to actuate electrically or mechanically some stopping device.

As the tension in the warp increases and diminishes periodically withthe cycle of the loom, the two parts a and b of the lease rod approachand recede from each other, and this movement greatly assists inseparating threads which may be adhering together owing to the dressingor from any other cause.

It will be evident that the sections or parts of my lease rod areseparated. In other words there is no direct connection between the two,such as is presented by a hinge. I interpose an expansible mediumbetween the parts or sections of said rod which normally or constantlytends to spread them apart. By virtue of the construction described saidsections can bodily approach and recede from each other in parallelismso that there is no tendency when they are spread apart of theirabrading the warp. When I speak of the rod sections or parts asseparated, I means to convey the idea that they are separated throughoutthe length thereof traversed by the warp.

Having thus described the nature of my The wire f is fixedsaid inventionand the best means I know of In testimony whereof I have signed mycarrying the same into practical eiiect, I name to this specification inthe presence of claim:

two subscribing Witnesses. A lease rod havlng sections and an expan-THOMAS ALBERT BRIGGS CARVER. sive medlum therefor serving to posltlvelyWitnesses: spread salcl sections apart and maintain the ANDREW GRAHAMKim), same 1n parallel planes.

KATHERINE NICOLL SIMPSON

